Color: Blue, YellowMain Material of the Product: ABS+PCBackpack Weight Capacity: 10KGLuggage Weight Capacity: 20KGProduct Includes: 12-inch square backpack, 16-inch four-wheel trolley caseDimensions of the square backpack: 32 (L) 25 (W) 13 (H) cmDimensions of the four-wheel trolley case: 46 (L) 30 (W) 22 (H) cm, when the trolley handle is pulled to the highest position, the height from the ground is 83cmThe surface of the backpack and trolley case is covered with a frosted film. The back cover of the small backpack is made of knitted fabric, and it has a regular single wheel.